/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.iso.filter;

import org.jpos.core.Configurable;
import org.jpos.core.Configuration;
import org.jpos.iso.ISOChannel;
import org.jpos.iso.ISOFilter;
import org.jpos.iso.ISOMsg;
import org.jpos.util.LogEvent;


/**
 * DelayFilter can be used in order to
 * slow down an ISOChannel. Usefull while
 * debugging an application or simulating a server
 */
public class DelayFilter implements ISOFilter, Configurable {
	int delay;

	public DelayFilter() {
		super();
		delay = 0;
	}

	/**
	 * @param delay desired delay, expressed in milliseconds
	 */
	public DelayFilter(int delay) {
		super();
		this.delay = delay;
	}

	/**
	 * @param cfg <ul>
	 *            <li>delay (expressed in milliseconds)
	 *            </ul>
	 */
	public void setConfiguration(Configuration cfg) {
		delay = cfg.getInt("delay");
	}

	public ISOMsg filter(ISOChannel channel, ISOMsg m, LogEvent evt) {
		evt.addMessage("<delay-filter delay=\"" + delay + "\"/>");
		if (delay > 0) {
			try {
				Thread.sleep(delay);
			} catch (InterruptedException e) {
			}
		}
		return m;
	}
}

